Primary photosensitization in cattle caused by Froelichia humboldtiana

Three outbreaks of primary photosensitization caused by Froelichia humboldtiana are reported in the semiarid region of the states of Pernambuco and Paraíba, in northeastern Brazil. The disease occurred from March to June 2011, affecting 27 bovines out of a total of 70. The main lesions consisted of...

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Bibliographic Details
Published in:Research in veterinary science 2012-12, Vol.93 (3), p.1337-1340
Main Authors: Souza, Paulo E.C., Oliveira, Samuel S., Aguiar-Filho, Cristiano R., Cunha, Ana L.B., Albuquerque, Raquel F., Evêncio-Neto, Joaquim, Riet-Correa, Franklin, Mendonça, Fábio S.
Format: Article
Language:English
Subjects:
Amaranthaceae - chemistry
Animals
aspartate transaminase
bilirubin
blood serum
Bovines
Cattle
Cattle Diseases - chemically induced
Cattle Diseases - pathology
dermatitis
Disease Outbreaks
edema
Female
forage
gamma-glutamyltransferase
necrosis
Photodermatitis
photosensitivity disorders
Photosensitivity Disorders - chemically induced
Plant poisoning
Plant Poisoning - veterinary
Plants, Toxic - toxicity
Poisonous plants
Rain
semiarid zones
Time Factors
Veterinary medicine
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Summary:Three outbreaks of primary photosensitization caused by Froelichia humboldtiana are reported in the semiarid region of the states of Pernambuco and Paraíba, in northeastern Brazil. The disease occurred from March to June 2011, affecting 27 bovines out of a total of 70. The main lesions consisted of dermatitis of the white skin, with edema and necrosis. All the bovines recovered after removal from the areas invaded by F. humboldtiana. To produce the disease experimentally, one bovine with white skin was placed for 14days into an area with F. humboldtiana as the sole forage. This bovine presented photodermatitis on the third day of consumption. The serum concentrations of total, indirect, and conjugated bilirubin and the serum activities of gamma-glutamyl transferase (GGT) and aspartate-aminotransferase (AST) in the spontaneously affected cattle and in the experimental cattle remained within normal ranges. It is concluded that F. humboldtiana causes primary photosensitization in cattle in northeastern Brazil.
ISSN:0034-5288
1532-2661
DOI:10.1016/j.rvsc.2012.04.005